风湿性心脏瓣膜病的主要病因是 A．七情所伤 B．饮食不节 C．禀赋不足 D．劳倦体虚

A few weeks later the first buildings ______   had been damaged were repaired .

A．which

B．that

C．where

D．in which

Suzy's jeans are the same______ Anna's but different______ Elsa's.[ ]

A. as; as      

B. as; like        

C. like; as        

D. as; from

-What was she angry      ?        

-The broken glass.         [ ]

A. with                

B. to        

C. about                

D. over

We don’t have much homework now and our school bags are _____ they used to be.[ ]

A. as heavy as

B. not as heavy as

C. as heavily as

D. not as heavily as

使酮糖和含有酮糖的低聚糖呈红色的是( )

A．硝酸银试剂
B．三苯四氮唑盐试剂
C．苯胺-邻苯二甲酸试剂
D．3，5-二羟基甲苯-盐酸试剂
E．过碘酸加联苯胺